针对命令行的扩展
PHP Manual

GNU Readline

User Contributed Notes

list2011 at lunch dot za dot net 02-Feb-2012 07:11
When readline is enabled, php switches the terminal mode to accept line-buffered input.  This means that the proper way to use the cli when you pipe to an interactive command is to explicitly specify that php is not using the terminal for input:

php somescript.php < /dev/null | less

针对命令行的扩展
PHP Manual